/*
 * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Copyright 1999-2002,2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * WARNING: because java doesn't support multi-inheritance some code is
 * duplicated. If you're changing this file you probably want to change
 * DeferredElementNSImpl.java at the same time.
 */

package com.sun.org.apache.xerces.internal.dom;

import org.w3c.dom.NamedNodeMap;

/**
 * Elements represent most of the "markup" and structure of the
 * document.  They contain both the data for the element itself
 * (element name and attributes), and any contained nodes, including
 * document text (as children).
 * <P>
 * Elements may have Attributes associated with them; the API for this is
 * defined in Node, but the function is implemented here. In general, XML
 * applications should retrive Attributes as Nodes, since they may contain
 * entity references and hence be a fairly complex sub-tree. HTML users will
 * be dealing with simple string values, and convenience methods are provided
 * to work in terms of Strings.
 * <P>
 * DeferredElementImpl inherits from ElementImpl which does not support
 * Namespaces. DeferredElementNSImpl, which inherits from ElementNSImpl, does.
 *
 * @xerces.internal
 * @see DeferredElementNSImpl
 * @since PR-DOM-Level-1-19980818.
 */
public class DeferredElementImpl
    extends ElementImpl
    implements DeferredNode {

  //
  // Constants
  //

  /**
   * Serialization version.
   */
  static final long serialVersionUID = -7670981133940934842L;

  //
  // Data
  //

  /**
   * Node index.
   */
  protected transient int fNodeIndex;

  //
  // Constructors
  //

  /**
   * This is the deferred constructor. Only the fNodeIndex is given here. All
   * other data, can be requested from the ownerDocument via the index.
   */
  DeferredElementImpl(DeferredDocumentImpl ownerDoc, int nodeIndex) {
    super(ownerDoc, null);

    fNodeIndex = nodeIndex;
    needsSyncChildren(true);

  } // <init>(DocumentImpl,int)

  //
  // DeferredNode methods
  //

  /**
   * Returns the node index.
   */
  public final int getNodeIndex() {
    return fNodeIndex;
  }

  //
  // Protected methods
  //

  /**
   * Synchronizes the data (name and value) for fast nodes.
   */
  protected final void synchronizeData() {

    // no need to sync in the future
    needsSyncData(false);

    // fluff data
    DeferredDocumentImpl ownerDocument =
        (DeferredDocumentImpl) this.ownerDocument;

    // we don't want to generate any event for this so turn them off
    boolean orig = ownerDocument.mutationEvents;
    ownerDocument.mutationEvents = false;

    name = ownerDocument.getNodeName(fNodeIndex);

    // attributes
    setupDefaultAttributes();
    int index = ownerDocument.getNodeExtra(fNodeIndex);
    if (index != -1) {
      NamedNodeMap attrs = getAttributes();
      do {
        NodeImpl attr = (NodeImpl) ownerDocument.getNodeObject(index);
        attrs.setNamedItem(attr);
        index = ownerDocument.getPrevSibling(index);
      } while (index != -1);
    }

    // set mutation events flag back to its original value
    ownerDocument.mutationEvents = orig;

  } // synchronizeData()

  protected final void synchronizeChildren() {
    DeferredDocumentImpl ownerDocument =
        (DeferredDocumentImpl) ownerDocument();
    ownerDocument.synchronizeChildren(this, fNodeIndex);
  } // synchronizeChildren()

} // class DeferredElementImpl
